<template>
  <div class="tab-bar-item" @click="itemClick">
    <!--  这里不直接在slot里面加:class="{active:isActive}"/v-if的原因:
         插槽会被替换掉,比如:
         <slot :class="{active:isActive}" name="item-text"></slot>会被替换成
         <div slot="item-text">我的</div> (这里面就没有:class="{active:isActive}")
      -->
    <div v-if="!isActive"><slot name="item-icon"></slot></div>
    <div v-else><slot name="item-icon-active"></slot></div>
    <div :style="activeStyle">
      <slot name="item-text"></slot>
    </div>
<!--    <slot :class="{active:isActive}" name="item-text"></slot>-->
  </div>
</template>

<script>
export default {
  name: 'TabbarItem',
  props: {
    path: String,
    activeColor: {
      type: String,
      default: 'red'
    }
  },
  data () {
    return {
      // isActive:true
    }
  },
  computed: {
    isActive () {
      return this.$route.path.indexOf(this.path) !== -1
    },
    activeStyle () {
      return this.isActive ? { color: this.activeColor } : {}
    }
  },
  methods: {
    itemClick () {
      this.$router.replace(this.path)
    }
  }
}
</script>

<style scoped lang="scss">
  .tab-bar-item{
    flex: 1;
    text-align: center;
    height: 49px;
    font-size: 14px;
    img{
      width: 24px;
      height: 24px;
      margin-top: 3px;
      vertical-align: middle;
      margin-bottom: 2px;
    }
  }
</style>
